Disclosed is a urea tank and fuel tank assembly, which belongs to the field of automobile parts. The urea tank and fuel tank assembly includes a shell, wherein the shell includes an upper shell, a middle shell and a lower shell, the upper shell, the middle shell and the lower shell are welded separately to form a cavity including a fuel cavity. The urea tank and fuel tank assembly is welded after injection molding, so that not only is the shell uniform in wall thickness and high in mechanical strength, but also the welding stress is dispersed to the upper and lower ends of the shell by setting that the upper shell, the middle shell and the lower shell are welded separately, on the one hand, the stress concentration of the welded part of the shell is reduced and the cracking of the welded part is avoided.

A tank for transporting a liquid is disclosed. In some implementations, the tank includes a carrier having a plurality of compartments, each compartment of the plurality of compartments having an opening for containing one or more baffles. In some implementations, the tank includes a plurality of posts that are securable relative to the tank and configured to support the one or more baffles. In some implementations, the posts are removed from the tank to facilitate installation of the baffles. In some implementations, the posts are rotatable to facilitate installation of the baffles. In some implementations, the tank is a two-piece tank which facilitates access to the one or more baffles.